Acetylene-lamp.



- J. M. BROOK. ACETYLENE LAMP.

APPLICATION FILED OCT. 2 I915. 1,269,047; Patented June 11, 1918,

UNITED %TATE% PATENT @FFIQE.

JOHN M. BROOK, OF BROOKLYN, NEW YORK.

ACETYLENE-LALMP.

Application filed October 2, 1915.

To all whom it may concern:

Be it known that I, JOHN M. BROGK, a citizen of the United States, residing at Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Acetylene-Lamps, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to improvements in acetylene lamps and particularly miners acetylene cap lamps.

The object of the invention, sidered, is to provide a simple means whereby the flame will be supplied with air, while at the same time it will be protected against strong drafts such as would be likely to blow it out, and also will be protected against water dripping from a mine roof or the like.

With the above general object in view and some others which will be obvious to those skilled in the art,

broadly conthe invention consists in the features, details of construction and com-- binations of parts w hich will first be described in connection with the accompanying drawings and then particularly pointed out in the claims.

In the drawings Figure 1 is an elevation partly insection of a well known type of lamp, with the invention applied thereto;

Figs. 2, 3 and L are enlarged detail views illustrating the invention;

Fig. 5 is a detail view of one modification of the invention;

Fig. 6 is a similar view of another modification;

Fig. 7 is a front view of a cap or thimble.

Referring to Fig. 6, which shows the simplest form of the invention, A indicates a part of a lamp from which extends a burner-tube B, provided with a burner C,-

this being indlcated as an ordinary lava burner tip, which is inserted tightly in the burner tube.

Over the burner tube is placed a cap or thimble D arranged to form a chamber about theburner-outlet or orifice. The front wall of this chamber is provided with an opening (Z in line with the burner-orifice and ofsuch a size that the flame may extend through said opening so as to appear in front of the chamber or cap.

The cap is also provided with an opening or openings for the admission of air to the gas as t emerges from the burner ori- Specification of Letters Patent.-

Patented June 11, 1918.

Serial No. 53,725.

fice. In the present example these air inlets are arranged in the front wall of the cap around the flame-opening, as indicated at d, Figs. 6 and 7 The cap is arranged to be held in place detachably so that it may be removed to permit access to the burner, so that the latter may be cleaned or removed and replaced by another burner.

In the simple embodiment of the invention shown in Fig. 6 of the drawings, the exterior of the burner-tube is threaded and the ap D is correspondingly threaded interiorly so that it may be screwed into the burner-tube.

The air holes 03 are advantageously made of such size that they will tend to throttle the flow of air through them, so that when a heavy draft of air strikes the cap, the air will flow gently through the holes and therefore cannot blow out the flame. Furthermore, when, as in thebest embodiment of the invention these air holes are arranged around the flame opening in the front wall of the cap, the air passing through the holes will not strike the burner orifice, but will strike the end 'of the burner around the burneroriflce. This serves to check the speed of the air and allows it to reach the flame in a quiet condition. may be such as to supply all the air that is required to support maintain the flame. By this construction, the body of air in the chamber is kept hot and the incoming cold air is thereby heated up by commingling with the air in the chamber before reaching the gas.

Where a reflector is provided, as is generally the practice with miners lamps, the cap serves the further function of detachably holding the reflector in place against the reflector support. This is shown, for example, in Fig. 6, where E is the reflector and F is the reflector-support behind it. The reflector has an opening which will permit it to pass over the burner tube, but which is smaller than the outer diameter of that part of the cap B which contacts with the reflector.

It is obvious that by removing the capthe reflector may be The number of air holes.

combustion and thus B, atthe front end,

'geous, the said projections should tained. This preferred embodiment of burner is illustrated in Figs. 1 to at.

This burner is provided with a sleeve portion G screw-threaded to the end of the burner-tube B and has an enlarged head whose diameter is greater than that of the sleeve. This enlarged head has a burner orr fice g which is preferably coned at the front. From this coned portion extend radial slots, as indicated at 9, Fig. 3. Theouter wall of these radial slots merge into a peripheral groove 9 in the edge of the enlarged head, as shown in Fig. 2.

The cap or thimble D is provided with one or more inward extending projections (Z 2 and l. These may be made con veniently by pressing or indenting the circular wall of the cap, as indicated in Fi l. When plurality of such inward-extending projections are employed, as is advantabe so spaced apart that when the cap is put onto the end of the burner tube they will register with and enter the corresponding slots in the burner. This will enable them to be brought in line with the peripheral groove whereupon, by rotating the cap, the indentations will enter the groove 9 and hold the cap D in place.

With a burner of this special type, the diameter of the cap may be conveniently made greater than in the construction shown in Fig. 6, without the necessity of employing a special burner tube, and the depth of the chamber thereby reduced while still having a suflicient interior volume.

At the same time, the air holes (Z though closer to the burner in an axial direction, may be kept farther away radially so that this incoming air cannot injuriously affect the flame. The cap of shallower depth axially has the advantage that more of the flame will project beyond the cap.

Owing to the radial slots 9" in the the heating surface for heating the the chamber is materially increased.

lcVith a special burner of this type, the reflector may be held in place detachably either by the end of the sleeve G, as shown in Fig. 5, or the reflector may be held by the cap itself as shown in Fig. 1, according to the length of the burner tube and the size of the reflector support. The construction shown in Fig. 1 is advantageous because the flame is protected better by a shallow reflector.

Owing to the fact that the burner orifice is protected against strong drafts of air, it is diflicult, if not impossible, for the flame to be blown out accidentallyf This is particularly advantageous where a reflector is employed, because such reflecburner, anin tors, when employed with open burners,

serve to direct drafts of air against the flame and thus increase the dangers of accidental mitting air being such,

extinguishment. hen the cap is used in advance of the reflector it prevents the concentration of drafts of air on the flame by the reflector and even when the flame is struck by a heavy draft directly from the front and is blown back, the gas will generally continue to burn at the mouth of the burner orifice and hence, as soon as the draft is stopped the flame will again lengthen and project beyond the cap.

Obviously water dripping into the reflector or onto the cap cannot reach the burner and therefore cannot extinguish the flame.

What I claim is:

1. In an acetylene lamp, the combination, with a burner tube, and a burner connected therewith and having a burner-orifice, of a cap surrounding the burner and arranged to form a flame-surrounding chamber into which the burner-orifice opens, said cap having a flame opening ahead of the burnerorifice through which opening the flame passes and also having an opening for admitting air to the interior of the chamber at a point away from the burner orifice the flame opening being so large as compared to the burner orifice, and the relation of said opening and orifice to the opening for adthat under normal base of the flame is operating conditions the within said chamber.

2. In an acetylene lamp, the combination, with a burner-tube, and a burner connected therewith and having a burner-orifice, of a reflector, a reflector support, and a cap surrounding the burner and. arranged to form a flame-surrounding chamber into which the burner-orifice opens, and also arranged to hold the reflector against its support, said cap having a flame opening ahead of the burner orifice through which opening the flame passes and also having an opening for admitting air to the interior of the chamber at a point away from the burner-orifice, the flame opening being so large as compared to the burner orifice, and the relation of said opening and orifice to the opening for admitting air being such, that under normal operating conditions the base of the flame is within said chamber.

3. In an acetylene lamp, the combination, with a burner-tube, and a burner connected therewith and having a burner-orifice, of a cap connected to the burner and forming a flame-surrounding chamber into which the burner-orifice opens, said cap having aflameopening in its front wall substantially in line with the burner-orifice through which opening the flame passes and also having a plurality of air-inlet openings substantially smaller than the flame opening arranged to supply air to the chamber out of the direct path of the flame.

4. In an acetylene lamp, the combination, with a burner-tube, and a burner connected therewith, said burner having a burnerorifice and grooves in its face connected with said orifice, of a cap connected to the burner and forming a chamber into which the burner-orifice opens, said cap having a flameopening in its front wall substantially in line with the burner-orifice and also having a plurality of air inlet openings arranged to supply air to the chamber out of the direct path of the flame.

5. In an acetylene lamp, the combination, with a burner tube, and a. burner connected therewith, said burner having an enlarged circular front portion provided with a peripheral groove and having a burner-orifice and grooves extending from said orifice and merging into the peripheral groove, of a cap having a plurality of inward projections arranged to enter corresponding grooves in the burner and to lock with the peripheral groove, said cap also having a flame-opening in its front wall substantially in line with the burner-orifice and also having a plurality of air-inlet openings arranged to supply air to the chamber out of the direct path of the flame.

6. In an acetylene lamp, with a burner-tube, and a burner connected therewith, said burner having an enlarged circular front portion provided with a peripheral groove and having a burner-orifice and grooves extending from said orifice and merging into the peripheral groove, of a the combination,

ahead of the cap having a plurality of inward projections arranged to enter corresponding grooves in the burner and to lock with the peripheral groove, said cap also having a flame-opening in its front wall substantially in line with the burner-orifice and also having a plurality of air-inlet openings arranged to supply air to the chamber out of the direct path of the flame, a reflector support and a reflector arranged to be pressed against the support by the cap.

7. In an open-flame portable acetylene lamp, the combination, with a reflector, a burner-tube, and a burner connected therewith and having a burner orifice, of a cap arranged in front of the reflector surrounding the burner and arranged to form a flamesurrounding chamber, said cap having an opening large enough to permit the passage of the flame through it, said opening being burner orifice, the cap also having its front wall provided with an opening for admitting air to the interior of the chamber at a point away from the burner orifice.

In testimony whereof, my hand in the presence witnesses.

I have hereunto set of two subscribing JOHN M. BROOK.

Witnesses EDWARD Bnmen, GUSTAVE Eeenn'r.

Copies of this patent may be obtained for five cents each, by addressing-the Commissioner of Patents,

Washington, D. C. 4 

